AWS Welding Procedure Qualifier case studies
AWS Welding Procedure Qualifier · Put your knowledge to work in context.
The Welding Procedure Qualifier (WPQ2) is one of four required endorsements that AWS lists toward earning the Senior Certified Welding Inspector (SCWI) credential. AWS states that the standalone SCWI exam is retired and that candidates now qualify step by step by completing WPQ1, WPQ2, WCQA, and NDEC. The AWS Welding Procedure Qualifier case studies are 5 cases and about 2,504 words.
1PQR Coverage for a Thicker Nozzle
A fabrication shop qualified a GTAW root plus SMAW fill/cap procedure on 12 mm (0.47 in) carbon steel plate to ASME Section IX. The PQR records a single tensile test set (two specimens) passing at 470 MPa, one 180-degree bend pair passing, and Charpy impact tests at minus 20 C with 42 J average.
566 words, about 3 min2WPS Document Control Gap
During an internal audit, a welding coordinator finds that three WPSs used on a pressure-vessel job reference a PQR number that was superseded eight months ago. The current PQR has revised heat input limits and a different preheat minimum.
495 words, about 2 min3RT Coverage Dispute on a Circumferential Weld
A contractor is welding a 610 mm (24 in) diameter, 12.7 mm wall carbon steel pipe spool. The specification requires 100 percent radiography of circumferential butt welds.
508 words, about 3 min4Welder Qualification Transferability
A welder qualified on 6 mm (0.24 in) plate in the 3G position with GTAW root and SMAW fill is assigned to weld a 25 mm (0.98 in) nozzle in the 6G position using the same processes. The welder's certificate shows qualification on 6 mm plate, 3G, GTAW/SMAW, dated 14 months ago, with continuous employment documented.
464 words, about 2 min5Impact Test Failure on a Qualified Procedure
A PQR for SMAW on 20 mm carbon steel specifies impact testing at minus 30 C. The test results show three specimens with absorbed energies of 38 J, 41 J, and 22 J.
471 words, about 2 min